The Perth Mint The 1st 1Kg Silver Bar - Serial No.1 (Pictures below of a recent acquisition) After extensive research I believe this to be the 1st 1Kg Silver Bar produced by The Perth Mint. From what I can find this seems to be the oldest logo design used on the 1Kg bars, I can't seem to find any older designs for the 1Kg bars. Each of the bars in this series has a serial number on the back, as yet I have never seen any of these bars designs without a serial number. I also believe this bar pre-dates many other Serial Numbered Perth Mint Silver bars as this series is one of the few serials number series that had no structure to the numbering system. Other series use letters 'A' and 'B' as a pre-fix or even would use zeros as a pre-fix i.e. if this was a planned batch then the series may have started at '00001' rather than just '1'. The lack of any real structure or system leads me to believe this would have also been one of the earlier batch of Silver bars as well as the first of this size. The number on this bar is constant with this series as all the 2 digit serials have only 2 digits to them, 3 digit serials have the 3 digits to them and so on. I have spoken to The Perth Mint about this bar but unfortunately those that would have the knowledge of any baring system used in the 70's or 80's no longer work there. The person I spoke to while helpful was not able to either confirm or deny if this was the 1st of the 1Kg Silver bar produced. I'll leave it now for people to comment, perhaps someone else can shed some more light, three things I would like to know if anyone can clarify. 1. Can anyone show me if there are any older 1Kg Perth Mint silver bar designs? 2. Can anyone show me if there are any of these 1Kg Perth Mint designs without a serial number? 3. Can anyone show me if there is a way to tell if any other Perth Mint silver bar pre-dates this one?